reloading 300 ultra mag - The Firearms Forum

30 cal club · 11-17-2008, 04:12 PM

hello, new to this ultramag. I m having problems seating and crimping the bullet. I keep rolling the shoulder. I tryed adjusting everything to get it right. never had this problem on my 308 or 06 i tryed backing it off but its not crimping right. i know you guys know what im #@^$# up. i have a rcbs press and die set, also someone i was talking to said to buy a crimper as like a final step to get rid of bullet runout. what is the tool called and were can i get it.

JLA · 11-17-2008, 05:28 PM

lee precision has a factory crimp die for just about every cartridge ever made, you might do well with a neck sizing die for that bruiser belted magnum, it will help you squeeze all the accuracy possible from that cartridge, at least you will be able to hit what you 'flinch' at anyways

11-17-2008, 04:12 PM	#1
30 cal club Member Join Date: Nov 2008 Posts: 1	reloading 300 ultra mag hello, new to this ultramag. I m having problems seating and crimping the bullet. I keep rolling the shoulder. I tryed adjusting everything to get it right. never had this problem on my 308 or 06 i tryed backing it off but its not crimping right. i know you guys know what im #@^$# up. i have a rcbs press and die set, also someone i was talking to said to buy a crimper as like a final step to get rid of bullet runout. what is the tool called and were can i get it. -->

11-17-2008, 05:28 PM	#2
JLA TFF Moderator/Host Join Date: Feb 2007 Location: Heart Of Texas Contributor Posts: 17,305	Re: reloading 300 ultra mag lee precision has a factory crimp die for just about every cartridge ever made, you might do well with a neck sizing die for that bruiser belted magnum, it will help you squeeze all the accuracy possible from that cartridge, at least you will be able to hit what you 'flinch' at anyways __________________ It takes 43 muscles to frown, 17 to smile, and 3 for proper trigger squeeze. The latest caliber or gear is no substitute for experience and skill. Rifles and cartridges don't make hits -- shooters do. Fact of life: After Monday and Tuesday, even the calendar says WTF!